01
Shopify SaaS
App development, App Bridge, storefront integrations, Liquid templates, theme extensions, and merchant tooling across hundreds of live stores.
Shopify engineering, end to end: apps, storefronts, Liquid, and performance.
Eugene Shcherbakov · Helsinki
I build Shopify SaaS at Upnova: one codebase, 600+ live stores, every theme setup you can imagine and a few you can't. The product I work on has quietly processed $40M+ of other people's revenue, which I find much more interesting than my own landing page.
{% section 'expertise' %}
Shopify first. Full-stack underneath.
02
Full-stack product
End-to-end ownership from React frontends and Node backends to GraphQL APIs, Gadget.dev, infra, and internal AI features.
03
Performance & growth
Core Web Vitals and INP optimization, upsell infrastructure, and product decisions tied to revenue and merchant outcomes.
Skills & Technologies
Full-stack Software Engineer
- JavaScript
- TypeScript
- React
- Next.js
- Node.js
- Shopify
- GraphQL
- PostgreSQL
Liquid- Tailwind CSS
- Prisma
- GCP
{% section 'work' %}
Production systems, not side projects.
2025 - now
Upnova · Full Stack Engineer · Shopify
Shopify upsell app · $1M+ ARR · 600+ merchants · $40M+ merchant revenue
I work across the full Shopify product: app features, storefront integrations, custom Liquid templates, and AI-powered merchant tooling across hundreds of live stores. I've contributed to the migration from Builder.io onto our own React infrastructure, and I debug INP regressions across diverse theme setups.
- Shopify APIs
- Liquid
- App Bridge
- React
- TypeScript
- Node.js
- GraphQL
- Gadget.dev
- Tailwind
2024 - 2025
Shook Digital · Full Stack Engineer
TikTok-partner video SaaS · #1 fastest-growing startup in Finland (Sifted, 2024)
I joined early and helped grow the product into the #1 fastest-growing startup in Finland. I built web-based video editor features with a focus on performance, scalability, and bulk editing workflows, and sat in on customer calls to shape where the product went next.
- TypeScript
- React
- GraphQL
- PostgreSQL
2023
UpWash · Full Stack Engineer
Fleet Management SaaS · MVP in 3 months
I took Fleety, a fleet-management platform, from concept to working MVP in three months, solo. Backend, frontend, brand identity, and a Telegram integration for real-time fleet notifications. All of it was mine to get right.
- Node.js
- Express.js
- JavaScript
- Telegram API
2021 - 2023
BotBrains · Founder & Developer
Founded at 17 · Featured on the MetaTrader (MQL5) website
My first company, started at 17. A no-code visual editor that generates MQL5 trading-robot code, deployable straight to MetaTrader 5. Built entirely by me, and eventually featured on the official MetaTrader website.
- PHP
- JavaScript
- MQL5
{% section 'featured-project' %}
BotBrains
2021 - 2023
No-code platform for creating algorithmic trading robots. Built entirely solo. A visual editor generates MQL5 code deployable to MetaTrader 5. Featured on the official MetaTrader (MQL5) website.
read the feature on mql5.com
{% section 'about' %}
I started a company at 17 (BotBrains, a no-code editor that generates trading-bot code, featured on the official MetaTrader site), then spent the next years shipping SaaS: a fleet-management MVP in 3 months, a video editor at the fastest-growing startup in Finland, and now Shopify products at Upnova.
My opinion after 3+ years of this: most engineering effort is wasted on work that demos well and dies in production. Diverse merchant themes, slow devices, and real traffic are the actual test suite. That's the work I like, and the work I'm good at.
01Ship with clarity
Scope tightly, communicate trade-offs early, and deliver work that holds up in production, not just in demos.
02Own the outcome
From merchant support to architecture migrations, stay close to the problem until the product actually works.
03Build for scale
Performance, maintainability, and merchant diversity matter when one codebase powers hundreds of storefronts.
04Stay product-minded
Engineering decisions should connect to customer impact, revenue, and the team's ability to move faster.
{% section 'contact' %}
Open to roles and conversations around Shopify SaaS.
Architecture, app development, storefront performance, and growth. If you're building on Shopify, let's talk.